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Recent content by twidlerjohn

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    battery run time calculation help

    time calculation of battery If the load is constant, you can use the battery manufacturer's discharge curves and calibrate for the current.
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    Circuits for 3-Phase Electrical Paramters Monitoring

    monitoring 3phase electrical I think there is a typo on FvM's post: the IC is ADE7752. (not AD7758) BTW, I think this thread fits 'Power Electronics' better. john
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    Problem with inverter 12V 3000w

    inverter 12 3000w Wow, 3000W from 12V? That means the battery current will be 250amps!
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    cell phone jammer circuit diagram, ideas

    build a cellular jammer Hi all, Nice thread, this! Even the non-tech discussions - illegal stuf. I've heard that the US government employs professional hackers to safeguard federal networks/databases. But they also say hacking is illegal, right? By the way, I get another question/idea from...
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    LM317 battery charger

    But, please observe that the transistor senses voltage and not current. To sense current, there has to be a series-drop resistor.
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    Keyless Entry Transmitter 433MHz design

    Check this ckt: h**p://www.electronics-project-design.com/KeylessLock.html
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    Help me with designing firing circuit of MOSFET

    firing circuit of mosfet Logic level MOSFETs can be switched with logic gates, no need for a special driver. Unless it's a half-bridge where you need isolated High-side and Low-side drivers.
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    Doubts about Audio Amp outputs

    Audio Amp outputs Can't see the enlarged pic.
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    Help me choose circuits for a turning table project

    what circuit? The simplest thing would be a brush DC motor such as an old 12V auto wiper motor (has good torque, has built-in reduction gears). To reverse the motion you could use a 2p2w toggle switch that is switched by a mechanical stub attached to the turntable.
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    Requirements for GSM jammer design

    schematics gsm jammer Thanks Buriedcode, excellent info there. john

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